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| Q. |
The wedge-shaped portion of the backfill tending to move with the wall is called |
| A. | wedge fall |
| B. | active fall |
| C. | failure wedge |
| D. | none of the mentioned |
| Answer» C. failure wedge | |
| Explanation: during the active state, the wall moves away from backfill and a certain portion of the backfill in wedged-shaped tend to move which is called a failure wedge. | |
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